drivers/phy/phy-sun4i-usb.c

   1 /*
   2  * Allwinner sun4i USB phy driver
   3  *
   4  * Copyright (C) 2014-2015 Hans de Goede <hdegoede@redhat.com>
   5  *
   6  * Based on code from
   7  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
   8  *
   9  * Modelled after: Samsung S5P/EXYNOS SoC series MIPI CSIS/DSIM DPHY driver
  10  * Copyright (C) 2013 Samsung Electronics Co., Ltd.
  11  * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  */
  23
  24 #include <linux/clk.h>
  25 #include <linux/delay.h>
  26 #include <linux/err.h>
  27 #include <linux/extcon.h>
  28 #include <linux/io.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/mutex.h>
  33 #include <linux/of.h>
  34 #include <linux/of_address.h>
  35 #include <linux/of_device.h>
  36 #include <linux/of_gpio.h>
  37 #include <linux/phy/phy.h>
  38 #include <linux/phy/phy-sun4i-usb.h>
  39 #include <linux/platform_device.h>
  40 #include <linux/power_supply.h>
  41 #include <linux/regulator/consumer.h>
  42 #include <linux/reset.h>
  43 #include <linux/usb/of.h>
  44 #include <linux/workqueue.h>
  45
  46 #define REG_ISCR                        0x00
  47 #define REG_PHYCTL_A10                  0x04
  48 #define REG_PHYBIST                     0x08
  49 #define REG_PHYTUNE                     0x0c
  50 #define REG_PHYCTL_A33                  0x10
  51 #define REG_PHY_UNK_H3                  0x20
  52
  53 #define REG_PMU_UNK_H3                  0x10
  54
  55 #define PHYCTL_DATA                     BIT(7)
  56
  57 #define SUNXI_AHB_ICHR8_EN              BIT(10)
  58 #define SUNXI_AHB_INCR4_BURST_EN        BIT(9)
  59 #define SUNXI_AHB_INCRX_ALIGN_EN        BIT(8)
  60 #define SUNXI_ULPI_BYPASS_EN            BIT(0)
  61
  62 /* ISCR, Interface Status and Control bits */
  63 #define ISCR_ID_PULLUP_EN               (1 << 17)
  64 #define ISCR_DPDM_PULLUP_EN     (1 << 16)
  65 /* sunxi has the phy id/vbus pins not connected, so we use the force bits */
  66 #define ISCR_FORCE_ID_MASK      (3 << 14)
  67 #define ISCR_FORCE_ID_LOW               (2 << 14)
  68 #define ISCR_FORCE_ID_HIGH      (3 << 14)
  69 #define ISCR_FORCE_VBUS_MASK    (3 << 12)
  70 #define ISCR_FORCE_VBUS_LOW     (2 << 12)
  71 #define ISCR_FORCE_VBUS_HIGH    (3 << 12)
  72
  73 /* Common Control Bits for Both PHYs */
  74 #define PHY_PLL_BW                      0x03
  75 #define PHY_RES45_CAL_EN                0x0c
  76
  77 /* Private Control Bits for Each PHY */
  78 #define PHY_TX_AMPLITUDE_TUNE           0x20
  79 #define PHY_TX_SLEWRATE_TUNE            0x22
  80 #define PHY_VBUSVALID_TH_SEL            0x25
  81 #define PHY_PULLUP_RES_SEL              0x27
  82 #define PHY_OTG_FUNC_EN                 0x28
  83 #define PHY_VBUS_DET_EN                 0x29
  84 #define PHY_DISCON_TH_SEL               0x2a
  85 #define PHY_SQUELCH_DETECT              0x3c
  86
  87 #define MAX_PHYS                        4
  88
  89 /*
  90  * Note do not raise the debounce time, we must report Vusb high within 100ms
  91  * otherwise we get Vbus errors
  92  */
  93 #define DEBOUNCE_TIME                   msecs_to_jiffies(50)
  94 #define POLL_TIME                       msecs_to_jiffies(250)
  95
  96 enum sun4i_usb_phy_type {
  97         sun4i_a10_phy,
  98         sun6i_a31_phy,
  99         sun8i_a33_phy,
 100         sun8i_h3_phy,
 101 };
 102
 103 struct sun4i_usb_phy_cfg {
 104         int num_phys;
 105         enum sun4i_usb_phy_type type;
 106         u32 disc_thresh;
 107         u8 phyctl_offset;
 108         bool dedicated_clocks;
 109 };
 110
 111 struct sun4i_usb_phy_data {
 112         void __iomem *base;
 113         const struct sun4i_usb_phy_cfg *cfg;
 114         enum usb_dr_mode dr_mode;
 115         struct mutex mutex;
 116         struct sun4i_usb_phy {
 117                 struct phy *phy;
 118                 void __iomem *pmu;
 119                 struct regulator *vbus;
 120                 struct reset_control *reset;
 121                 struct clk *clk;
 122                 bool regulator_on;
 123                 int index;
 124         } phys[MAX_PHYS];
 125         int first_phy;
 126         /* phy0 / otg related variables */
 127         struct extcon_dev *extcon;
 128         bool phy0_init;
 129         struct gpio_desc *id_det_gpio;
 130         struct gpio_desc *vbus_det_gpio;
 131         struct power_supply *vbus_power_supply;
 132         struct notifier_block vbus_power_nb;
 133         bool vbus_power_nb_registered;
 134         int id_det_irq;
 135         int vbus_det_irq;
 136         int id_det;
 137         int vbus_det;
 138         struct delayed_work detect;
 139 };
 140
 141 #define to_sun4i_usb_phy_data(phy) \
 142         container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index])
 143
 144 static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set)
 145 {
 146         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 147         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 148         u32 iscr;
 149
 150         iscr = readl(data->base + REG_ISCR);
 151         iscr &= ~clr;
 152         iscr |= set;
 153         writel(iscr, data->base + REG_ISCR);
 154 }
 155
 156 static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val)
 157 {
 158         if (val)
 159                 val = ISCR_FORCE_ID_HIGH;
 160         else
 161                 val = ISCR_FORCE_ID_LOW;
 162
 163         sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val);
 164 }
 165
 166 static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val)
 167 {
 168         if (val)
 169                 val = ISCR_FORCE_VBUS_HIGH;
 170         else
 171                 val = ISCR_FORCE_VBUS_LOW;
 172
 173         sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val);
 174 }
 175
 176 static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
 177                                 int len)
 178 {
 179         struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
 180         u32 temp, usbc_bit = BIT(phy->index * 2);
 181         void __iomem *phyctl = phy_data->base + phy_data->cfg->phyctl_offset;
 182         int i;
 183
 184         mutex_lock(&phy_data->mutex);
 185
 186         if (phy_data->cfg->type == sun8i_a33_phy) {
 187                 /* A33 needs us to set phyctl to 0 explicitly */
 188                 writel(0, phyctl);
 189         }
 190
 191         for (i = 0; i < len; i++) {
 192                 temp = readl(phyctl);
 193
 194                 /* clear the address portion */
 195                 temp &= ~(0xff << 8);
 196
 197                 /* set the address */
 198                 temp |= ((addr + i) << 8);
 199                 writel(temp, phyctl);
 200
 201                 /* set the data bit and clear usbc bit*/
 202                 temp = readb(phyctl);
 203                 if (data & 0x1)
 204                         temp |= PHYCTL_DATA;
 205                 else
 206                         temp &= ~PHYCTL_DATA;
 207                 temp &= ~usbc_bit;
 208                 writeb(temp, phyctl);
 209
 210                 /* pulse usbc_bit */
 211                 temp = readb(phyctl);
 212                 temp |= usbc_bit;
 213                 writeb(temp, phyctl);
 214
 215                 temp = readb(phyctl);
 216                 temp &= ~usbc_bit;
 217                 writeb(temp, phyctl);
 218
 219                 data >>= 1;
 220         }
 221         mutex_unlock(&phy_data->mutex);
 222 }
 223
 224 static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable)
 225 {
 226         u32 bits, reg_value;
 227
 228         if (!phy->pmu)
 229                 return;
 230
 231         bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN |
 232                 SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN;
 233
 234         reg_value = readl(phy->pmu);
 235
 236         if (enable)
 237                 reg_value |= bits;
 238         else
 239                 reg_value &= ~bits;
 240
 241         writel(reg_value, phy->pmu);
 242 }
 243
 244 static int sun4i_usb_phy_init(struct phy *_phy)
 245 {
 246         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 247         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 248         int ret;
 249         u32 val;
 250
 251         ret = clk_prepare_enable(phy->clk);
 252         if (ret)
 253                 return ret;
 254
 255         ret = reset_control_deassert(phy->reset);
 256         if (ret) {
 257                 clk_disable_unprepare(phy->clk);
 258                 return ret;
 259         }
 260
 261         if (data->cfg->type == sun8i_h3_phy) {
 262                 if (phy->index == 0) {
 263                         val = readl(data->base + REG_PHY_UNK_H3);
 264                         writel(val & ~1, data->base + REG_PHY_UNK_H3);
 265                 }
 266
 267                 val = readl(phy->pmu + REG_PMU_UNK_H3);
 268                 writel(val & ~2, phy->pmu + REG_PMU_UNK_H3);
 269         } else {
 270                 /* Enable USB 45 Ohm resistor calibration */
 271                 if (phy->index == 0)
 272                         sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
 273
 274                 /* Adjust PHY's magnitude and rate */
 275                 sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
 276
 277                 /* Disconnect threshold adjustment */
 278                 sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
 279                                     data->cfg->disc_thresh, 2);
 280         }
 281
 282         sun4i_usb_phy_passby(phy, 1);
 283
 284         if (phy->index == 0) {
 285                 data->phy0_init = true;
 286
 287                 /* Enable pull-ups */
 288                 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN);
 289                 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN);
 290
 291                 /* Force ISCR and cable state updates */
 292                 data->id_det = -1;
 293                 data->vbus_det = -1;
 294                 queue_delayed_work(system_wq, &data->detect, 0);
 295         }
 296
 297         return 0;
 298 }
 299
 300 static int sun4i_usb_phy_exit(struct phy *_phy)
 301 {
 302         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 303         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 304
 305         if (phy->index == 0) {
 306                 /* Disable pull-ups */
 307                 sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0);
 308                 sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0);
 309                 data->phy0_init = false;
 310         }
 311
 312         sun4i_usb_phy_passby(phy, 0);
 313         reset_control_assert(phy->reset);
 314         clk_disable_unprepare(phy->clk);
 315
 316         return 0;
 317 }
 318
 319 static int sun4i_usb_phy0_get_id_det(struct sun4i_usb_phy_data *data)
 320 {
 321         switch (data->dr_mode) {
 322         case USB_DR_MODE_OTG:
 323                 return gpiod_get_value_cansleep(data->id_det_gpio);
 324         case USB_DR_MODE_HOST:
 325                 return 0;
 326         case USB_DR_MODE_PERIPHERAL:
 327         default:
 328                 return 1;
 329         }
 330 }
 331
 332 static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data)
 333 {
 334         if (data->vbus_det_gpio)
 335                 return gpiod_get_value_cansleep(data->vbus_det_gpio);
 336
 337         if (data->vbus_power_supply) {
 338                 union power_supply_propval val;
 339                 int r;
 340
 341                 r = power_supply_get_property(data->vbus_power_supply,
 342                                               POWER_SUPPLY_PROP_PRESENT, &val);
 343                 if (r == 0)
 344                         return val.intval;
 345         }
 346
 347         /* Fallback: report vbus as high */
 348         return 1;
 349 }
 350
 351 static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data)
 352 {
 353         return data->vbus_det_gpio || data->vbus_power_supply;
 354 }
 355
 356 static bool sun4i_usb_phy0_poll(struct sun4i_usb_phy_data *data)
 357 {
 358         if ((data->id_det_gpio && data->id_det_irq <= 0) ||
 359             (data->vbus_det_gpio && data->vbus_det_irq <= 0))
 360                 return true;
 361
 362         /*
 363          * The A31 companion pmic (axp221) does not generate vbus change
 364          * interrupts when the board is driving vbus, so we must poll
 365          * when using the pmic for vbus-det _and_ we're driving vbus.
 366          */
 367         if (data->cfg->type == sun6i_a31_phy &&
 368             data->vbus_power_supply && data->phys[0].regulator_on)
 369                 return true;
 370
 371         return false;
 372 }
 373
 374 static int sun4i_usb_phy_power_on(struct phy *_phy)
 375 {
 376         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 377         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 378         int ret;
 379
 380         if (!phy->vbus || phy->regulator_on)
 381                 return 0;
 382
 383         /* For phy0 only turn on Vbus if we don't have an ext. Vbus */
 384         if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) &&
 385                                 data->vbus_det)
 386                 return 0;
 387
 388         ret = regulator_enable(phy->vbus);
 389         if (ret)
 390                 return ret;
 391
 392         phy->regulator_on = true;
 393
 394         /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */
 395         if (phy->index == 0 && sun4i_usb_phy0_poll(data))
 396                 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
 397
 398         return 0;
 399 }
 400
 401 static int sun4i_usb_phy_power_off(struct phy *_phy)
 402 {
 403         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 404         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 405
 406         if (!phy->vbus || !phy->regulator_on)
 407                 return 0;
 408
 409         regulator_disable(phy->vbus);
 410         phy->regulator_on = false;
 411
 412         /*
 413          * phy0 vbus typically slowly discharges, sometimes this causes the
 414          * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan.
 415          */
 416         if (phy->index == 0 && !sun4i_usb_phy0_poll(data))
 417                 mod_delayed_work(system_wq, &data->detect, POLL_TIME);
 418
 419         return 0;
 420 }
 421
 422 void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled)
 423 {
 424         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 425
 426         sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2);
 427 }
 428 EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect);
 429
 430 static const struct phy_ops sun4i_usb_phy_ops = {
 431         .init           = sun4i_usb_phy_init,
 432         .exit           = sun4i_usb_phy_exit,
 433         .power_on       = sun4i_usb_phy_power_on,
 434         .power_off      = sun4i_usb_phy_power_off,
 435         .owner          = THIS_MODULE,
 436 };
 437
 438 static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
 439 {
 440         struct sun4i_usb_phy_data *data =
 441                 container_of(work, struct sun4i_usb_phy_data, detect.work);
 442         struct phy *phy0 = data->phys[0].phy;
 443         int id_det, vbus_det, id_notify = 0, vbus_notify = 0;
 444
 445         if (phy0 == NULL)
 446                 return;
 447
 448         id_det = sun4i_usb_phy0_get_id_det(data);
 449         vbus_det = sun4i_usb_phy0_get_vbus_det(data);
 450
 451         mutex_lock(&phy0->mutex);
 452
 453         if (!data->phy0_init) {
 454                 mutex_unlock(&phy0->mutex);
 455                 return;
 456         }
 457
 458         if (id_det != data->id_det) {
 459                 /*
 460                  * When a host cable (id == 0) gets plugged in on systems
 461                  * without vbus detection report vbus low for long enough for
 462                  * the musb-ip to end the current device session.
 463                  */
 464                 if (data->dr_mode == USB_DR_MODE_OTG &&
 465                     !sun4i_usb_phy0_have_vbus_det(data) && id_det == 0) {
 466                         sun4i_usb_phy0_set_vbus_detect(phy0, 0);
 467                         msleep(200);
 468                         sun4i_usb_phy0_set_vbus_detect(phy0, 1);
 469                 }
 470                 sun4i_usb_phy0_set_id_detect(phy0, id_det);
 471                 data->id_det = id_det;
 472                 id_notify = 1;
 473         }
 474
 475         if (vbus_det != data->vbus_det) {
 476                 sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det);
 477                 data->vbus_det = vbus_det;
 478                 vbus_notify = 1;
 479         }
 480
 481         mutex_unlock(&phy0->mutex);
 482
 483         if (id_notify) {
 484                 extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST,
 485                                         !id_det);
 486                 /*
 487                  * When a host cable gets unplugged (id == 1) on systems
 488                  * without vbus detection report vbus low for long enough to
 489                  * the musb-ip to end the current host session.
 490                  */
 491                 if (data->dr_mode == USB_DR_MODE_OTG &&
 492                     !sun4i_usb_phy0_have_vbus_det(data) && id_det == 1) {
 493                         mutex_lock(&phy0->mutex);
 494                         sun4i_usb_phy0_set_vbus_detect(phy0, 0);
 495                         msleep(1000);
 496                         sun4i_usb_phy0_set_vbus_detect(phy0, 1);
 497                         mutex_unlock(&phy0->mutex);
 498                 }
 499         }
 500
 501         if (vbus_notify)
 502                 extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det);
 503
 504         if (sun4i_usb_phy0_poll(data))
 505                 queue_delayed_work(system_wq, &data->detect, POLL_TIME);
 506 }
 507
 508 static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id)
 509 {
 510         struct sun4i_usb_phy_data *data = dev_id;
 511
 512         /* vbus or id changed, let the pins settle and then scan them */
 513         mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
 514
 515         return IRQ_HANDLED;
 516 }
 517
 518 static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb,
 519                                       unsigned long val, void *v)
 520 {
 521         struct sun4i_usb_phy_data *data =
 522                 container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb);
 523         struct power_supply *psy = v;
 524
 525         /* Properties on the vbus_power_supply changed, scan vbus_det */
 526         if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply)
 527                 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
 528
 529         return NOTIFY_OK;
 530 }
 531
 532 static struct phy *sun4i_usb_phy_xlate(struct device *dev,
 533                                         struct of_phandle_args *args)
 534 {
 535         struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
 536
 537         if (args->args[0] < data->first_phy ||
 538             args->args[0] >= data->cfg->num_phys)
 539                 return ERR_PTR(-ENODEV);
 540
 541         return data->phys[args->args[0]].phy;
 542 }
 543
 544 static int sun4i_usb_phy_remove(struct platform_device *pdev)
 545 {
 546         struct device *dev = &pdev->dev;
 547         struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
 548
 549         if (data->vbus_power_nb_registered)
 550                 power_supply_unreg_notifier(&data->vbus_power_nb);
 551         if (data->id_det_irq > 0)
 552                 devm_free_irq(dev, data->id_det_irq, data);
 553         if (data->vbus_det_irq > 0)
 554                 devm_free_irq(dev, data->vbus_det_irq, data);
 555
 556         cancel_delayed_work_sync(&data->detect);
 557
 558         return 0;
 559 }
 560
 561 static const unsigned int sun4i_usb_phy0_cable[] = {
 562         EXTCON_USB,
 563         EXTCON_USB_HOST,
 564         EXTCON_NONE,
 565 };
 566
 567 static int sun4i_usb_phy_probe(struct platform_device *pdev)
 568 {
 569         struct sun4i_usb_phy_data *data;
 570         struct device *dev = &pdev->dev;
 571         struct device_node *np = dev->of_node;
 572         struct phy_provider *phy_provider;
 573         struct resource *res;
 574         int i, ret;
 575
 576         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 577         if (!data)
 578                 return -ENOMEM;
 579
 580         mutex_init(&data->mutex);
 581         INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan);
 582         dev_set_drvdata(dev, data);
 583         data->cfg = of_device_get_match_data(dev);
 584         if (!data->cfg)
 585                 return -EINVAL;
 586
 587         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
 588         data->base = devm_ioremap_resource(dev, res);
 589         if (IS_ERR(data->base))
 590                 return PTR_ERR(data->base);
 591
 592         data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det",
 593                                                     GPIOD_IN);
 594         if (IS_ERR(data->id_det_gpio))
 595                 return PTR_ERR(data->id_det_gpio);
 596
 597         data->vbus_det_gpio = devm_gpiod_get_optional(dev, "usb0_vbus_det",
 598                                                       GPIOD_IN);
 599         if (IS_ERR(data->vbus_det_gpio))
 600                 return PTR_ERR(data->vbus_det_gpio);
 601
 602         if (of_find_property(np, "usb0_vbus_power-supply", NULL)) {
 603                 data->vbus_power_supply = devm_power_supply_get_by_phandle(dev,
 604                                                      "usb0_vbus_power-supply");
 605                 if (IS_ERR(data->vbus_power_supply))
 606                         return PTR_ERR(data->vbus_power_supply);
 607
 608                 if (!data->vbus_power_supply)
 609                         return -EPROBE_DEFER;
 610         }
 611
 612         data->dr_mode = of_usb_get_dr_mode_by_phy(np, 0);
 613         switch (data->dr_mode) {
 614         case USB_DR_MODE_OTG:
 615                 /* otg without id_det makes no sense, and is not supported */
 616                 if (!data->id_det_gpio) {
 617                         dev_err(dev, "usb0_id_det missing or invalid\n");
 618                         return -ENODEV;
 619                 }
 620                 /* fall through */
 621         case USB_DR_MODE_HOST:
 622         case USB_DR_MODE_PERIPHERAL:
 623                 data->extcon = devm_extcon_dev_allocate(dev,
 624                                                         sun4i_usb_phy0_cable);
 625                 if (IS_ERR(data->extcon))
 626                         return PTR_ERR(data->extcon);
 627
 628                 ret = devm_extcon_dev_register(dev, data->extcon);
 629                 if (ret) {
 630                         dev_err(dev, "failed to register extcon: %d\n", ret);
 631                         return ret;
 632                 }
 633                 break;
 634         default:
 635                 dev_info(dev, "dr_mode unknown, not registering usb phy0\n");
 636                 data->first_phy = 1;
 637         }
 638
 639         for (i = data->first_phy; i < data->cfg->num_phys; i++) {
 640                 struct sun4i_usb_phy *phy = data->phys + i;
 641                 char name[16];
 642
 643                 snprintf(name, sizeof(name), "usb%d_vbus", i);
 644                 phy->vbus = devm_regulator_get_optional(dev, name);
 645                 if (IS_ERR(phy->vbus)) {
 646                         if (PTR_ERR(phy->vbus) == -EPROBE_DEFER)
 647                                 return -EPROBE_DEFER;
 648                         phy->vbus = NULL;
 649                 }
 650
 651                 if (data->cfg->dedicated_clocks)
 652                         snprintf(name, sizeof(name), "usb%d_phy", i);
 653                 else
 654                         strlcpy(name, "usb_phy", sizeof(name));
 655
 656                 phy->clk = devm_clk_get(dev, name);
 657                 if (IS_ERR(phy->clk)) {
 658                         dev_err(dev, "failed to get clock %s\n", name);
 659                         return PTR_ERR(phy->clk);
 660                 }
 661
 662                 snprintf(name, sizeof(name), "usb%d_reset", i);
 663                 phy->reset = devm_reset_control_get(dev, name);
 664                 if (IS_ERR(phy->reset)) {
 665                         dev_err(dev, "failed to get reset %s\n", name);
 666                         return PTR_ERR(phy->reset);
 667                 }
 668
 669                 if (i) { /* No pmu for usbc0 */
 670                         snprintf(name, sizeof(name), "pmu%d", i);
 671                         res = platform_get_resource_byname(pdev,
 672                                                         IORESOURCE_MEM, name);
 673                         phy->pmu = devm_ioremap_resource(dev, res);
 674                         if (IS_ERR(phy->pmu))
 675                                 return PTR_ERR(phy->pmu);
 676                 }
 677
 678                 phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops);
 679                 if (IS_ERR(phy->phy)) {
 680                         dev_err(dev, "failed to create PHY %d\n", i);
 681                         return PTR_ERR(phy->phy);
 682                 }
 683
 684                 phy->index = i;
 685                 phy_set_drvdata(phy->phy, &data->phys[i]);
 686         }
 687
 688         data->id_det_irq = gpiod_to_irq(data->id_det_gpio);
 689         if (data->id_det_irq > 0) {
 690                 ret = devm_request_irq(dev, data->id_det_irq,
 691                                 sun4i_usb_phy0_id_vbus_det_irq,
 692                                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 693                                 "usb0-id-det", data);
 694                 if (ret) {
 695                         dev_err(dev, "Err requesting id-det-irq: %d\n", ret);
 696                         return ret;
 697                 }
 698         }
 699
 700         data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio);
 701         if (data->vbus_det_irq > 0) {
 702                 ret = devm_request_irq(dev, data->vbus_det_irq,
 703                                 sun4i_usb_phy0_id_vbus_det_irq,
 704                                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 705                                 "usb0-vbus-det", data);
 706                 if (ret) {
 707                         dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret);
 708                         data->vbus_det_irq = -1;
 709                         sun4i_usb_phy_remove(pdev); /* Stop detect work */
 710                         return ret;
 711                 }
 712         }
 713
 714         if (data->vbus_power_supply) {
 715                 data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify;
 716                 data->vbus_power_nb.priority = 0;
 717                 ret = power_supply_reg_notifier(&data->vbus_power_nb);
 718                 if (ret) {
 719                         sun4i_usb_phy_remove(pdev); /* Stop detect work */
 720                         return ret;
 721                 }
 722                 data->vbus_power_nb_registered = true;
 723         }
 724
 725         phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate);
 726         if (IS_ERR(phy_provider)) {
 727                 sun4i_usb_phy_remove(pdev); /* Stop detect work */
 728                 return PTR_ERR(phy_provider);
 729         }
 730
 731         return 0;
 732 }
 733
 734 static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = {
 735         .num_phys = 3,
 736         .type = sun4i_a10_phy,
 737         .disc_thresh = 3,
 738         .phyctl_offset = REG_PHYCTL_A10,
 739         .dedicated_clocks = false,
 740 };
 741
 742 static const struct sun4i_usb_phy_cfg sun5i_a13_cfg = {
 743         .num_phys = 2,
 744         .type = sun4i_a10_phy,
 745         .disc_thresh = 2,
 746         .phyctl_offset = REG_PHYCTL_A10,
 747         .dedicated_clocks = false,
 748 };
 749
 750 static const struct sun4i_usb_phy_cfg sun6i_a31_cfg = {
 751         .num_phys = 3,
 752         .type = sun6i_a31_phy,
 753         .disc_thresh = 3,
 754         .phyctl_offset = REG_PHYCTL_A10,
 755         .dedicated_clocks = true,
 756 };
 757
 758 static const struct sun4i_usb_phy_cfg sun7i_a20_cfg = {
 759         .num_phys = 3,
 760         .type = sun4i_a10_phy,
 761         .disc_thresh = 2,
 762         .phyctl_offset = REG_PHYCTL_A10,
 763         .dedicated_clocks = false,
 764 };
 765
 766 static const struct sun4i_usb_phy_cfg sun8i_a23_cfg = {
 767         .num_phys = 2,
 768         .type = sun4i_a10_phy,
 769         .disc_thresh = 3,
 770         .phyctl_offset = REG_PHYCTL_A10,
 771         .dedicated_clocks = true,
 772 };
 773
 774 static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = {
 775         .num_phys = 2,
 776         .type = sun8i_a33_phy,
 777         .disc_thresh = 3,
 778         .phyctl_offset = REG_PHYCTL_A33,
 779         .dedicated_clocks = true,
 780 };
 781
 782 static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = {
 783         .num_phys = 4,
 784         .type = sun8i_h3_phy,
 785         .disc_thresh = 3,
 786         .dedicated_clocks = true,
 787 };
 788
 789 static const struct of_device_id sun4i_usb_phy_of_match[] = {
 790         { .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg },
 791         { .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg },
 792         { .compatible = "allwinner,sun6i-a31-usb-phy", .data = &sun6i_a31_cfg },
 793         { .compatible = "allwinner,sun7i-a20-usb-phy", .data = &sun7i_a20_cfg },
 794         { .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg },
 795         { .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg },
 796         { .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg },
 797         { },
 798 };
 799 MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match);
 800
 801 static struct platform_driver sun4i_usb_phy_driver = {
 802         .probe  = sun4i_usb_phy_probe,
 803         .remove = sun4i_usb_phy_remove,
 804         .driver = {
 805                 .of_match_table = sun4i_usb_phy_of_match,
 806                 .name  = "sun4i-usb-phy",
 807         }
 808 };
 809 module_platform_driver(sun4i_usb_phy_driver);
 810
 811 MODULE_DESCRIPTION("Allwinner sun4i USB phy driver");
 812 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
 813 MODULE_LICENSE("GPL v2");